I am not suggesting that nature is God. But I have come to experience Divine Presence in it. Nor was John Muir suggesting that nature was God. John stepped away from the tyrannical and harsh exclusive Christian religion of his upbringing, because it never made his soul sing in any real way, and found something that made him come alive. It turned his whole life, his whole way of being, into an act of worship of the Creator.
Irenaeus said, "The glory of God is the human being fully alive."
We've all been given a wonderful gift. The Creator turned us over to ourselves and said......go live.
Nature is the first born of creation. And if that speaks anything to us, it should speak that the creator is a most magnificent artist...a creator of beauty. And the human being is a part of that beauty, and is a creator also, made in the likeness of the Creator. But in the turning over of ourselves to ourselves, and giving us freedom, choice enters the scene. The way we see God, the way we see ourselves, and the way we see others, becomes extremely important. It guides us to what we become. Creators of beauty....or creators of something not so beautiful.
Religion too often hasn't helped us at all. Too often God is turned into something that is not beautiful. But religion twists the distorted view of God and somehow rewires our heads to where those who follow it will begin to believe that that twisted story of a tyrannical bean counting exclusivist parental super figure in the sky is somehow beautiful. Everything then gets turned upside down.
Getting back to the Beautiful is a most important endeavor for the human being to engage in. Don't let religion and fear stand in your way.